Buchholtz announced Monday that she will leave the organization on March 22. She has been executive director since July 2011.

Buchholtz resigned from the Kalamazoo County board in December 2011 to take the position. A Republican, she had served as vice chairwoman of the board for four years and was chair of the board for two and a half years.

In a press release, Buchholtz said she wants to pursue "new opportunities closer to my small-business roots.”

"I have wholeheartedly enjoyed my time with the organization, my experience in the non-profit sector and the great accomplishments by the dedicated staff at Big Brothers Big Sisters," Buchholtz said in a press release. "Now I am looking forward to pursuing new opportunities closer to my small-business roots.”

Buchholtz was not available to comment immediately when called Monday afternoon.